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import { Client } from './client.mjs';
const $ = id => document.getElementById(id);
const text = new TextDecoder('utf-8', { fatal: true });
let client = null, current = null, currentPath = '/', busy = false, dirty = false;
let configuration = null;
function status(message, error = false) {
$('status').textContent = message;
$('status').classList.toggle('error', error);
}
function controls() {
for (const id of ['go', 'reload']) $(id).disabled = busy;
$('save').disabled = busy || !current || current.stat.directory || $('editor').hidden || !dirty;
$('download').disabled = busy || !current;
$('editor').readOnly = busy;
$('edit-status').textContent = dirty ? 'Unsaved changes.' : 'No unsaved changes.';
document.querySelector('main').setAttribute('aria-busy', String(busy));
}
async function action(operation) {
if (busy) return;
busy = true;
controls();
try { await operation(); }
catch (error) { status(error.message, true); }
finally { busy = false; controls(); }
}
async function connectedClient() {
if (client && !client.closed) return client;
if (!configuration) {
const response = await fetch('/_cloud9/config.json');
if (!response.ok) throw new Error('Unable to load server settings. Reload to try again.');
configuration = await response.json();
}
try { client = await Client.connect('/_cloud9/9p', configuration.user, configuration.tree); }
catch { throw new Error('Unable to reach the file server. Reload to try again.'); }
return client;
}
async function readPath(path) {
const active = await connectedClient();
try { return await active.readPath(path); }
catch (error) {
// A timed-out/closed transport has lost its fids. Retry reads once on a
// fresh session. Writes are never replayed after an uncertain result.
if (!active.closed) throw error;
return (await connectedClient()).readPath(path);
}
}
function normalizePath(path) {
const parts = [];
for (const name of path.split('/')) {
if (!name || name === '.') continue;
if (name === '..') parts.pop(); else parts.push(name);
}
return '/' + parts.join('/');
}
function pathURL(path) {
const parts = path.split('/').map(encodeURIComponent);
// Preserve access to an upstream directory named _cloud9 without colliding
// with the literal gateway prefix. Decode each component exactly once.
if (parts[1] === '_cloud9') parts[1] = '%5Fcloud9';
return parts.join('/');
}
function locationPath() {
const parts = location.pathname.split('/').map(part => {
let name;
try { name = decodeURIComponent(part); }
catch { throw new Error('The URL contains invalid path encoding.'); }
if (name.includes('/') || name.includes('\0')) throw new Error('The URL contains an invalid path component.');
return name;
});
return normalizePath(parts.join('/'));
}
function child(path, name) { return `${path.replace(/\/$/, '')}/${name}`; }
function mode(stat) {
let result = stat.directory ? 'd' : '-';
for (let bit = 8; bit >= 0; bit--) result += stat.mode & (1 << bit) ? 'rwx'[(8 - bit) % 3] : '-';
return result;
}
function pathLink(label, path, className = '') {
const link = document.createElement('a');
link.textContent = label;
link.href = pathURL(path);
link.dataset.path = path;
link.className = className;
return link;
}
function breadcrumbs(path) {
const node = $('breadcrumbs');
node.replaceChildren(pathLink('root', '/'));
let walked = '';
for (const name of path.split('/').filter(Boolean)) {
walked += '/' + name;
const separator = document.createElement('span');
separator.textContent = '/'; separator.className = 'separator';
node.append(separator, pathLink(name, walked));
}
node.lastElementChild.setAttribute('aria-current', 'page');
const parent = path.replace(/\/[^/]+$/, '') || '/';
$('up').hidden = path === '/';
$('up').href = pathURL(parent);
$('up').dataset.path = parent;
}
async function navigate(path, historyMode = 'push') {
path = normalizePath(path);
status('Loading…');
const result = await readPath(path);
current = result; currentPath = path; dirty = false;
$('path').value = path;
const url = pathURL(path);
if (historyMode === 'push' && location.pathname + location.search + location.hash !== url) history.pushState(null, '', url);
document.title = `${path} — cloud9`;
breadcrumbs(path);
$('directory').hidden = !result.stat.directory;
$('file').hidden = result.stat.directory;
if (result.stat.directory) {
const rows = document.createDocumentFragment();
const sorted = result.entries.sort((a, b) => Number(b.directory) - Number(a.directory) || a.name.localeCompare(b.name));
for (const entry of sorted) {
const row = document.createElement('tr');
const permissions = document.createElement('td'), name = document.createElement('td'), size = document.createElement('td');
permissions.className = 'mode'; permissions.textContent = mode(entry);
name.append(pathLink(entry.name + (entry.directory ? '/' : ''), child(path, entry.name), 'entry' + (entry.directory ? ' directory' : '')));
size.className = 'size'; size.textContent = entry.directory ? '—' : entry.length.toLocaleString();
row.append(permissions, name, size); rows.append(row);
}
$('entries').replaceChildren(rows);
$('empty').hidden = sorted.length !== 0;
status(`${sorted.length} ${sorted.length === 1 ? 'entry' : 'entries'}`);
} else {
$('filename').textContent = result.stat.name;
$('file-mode').textContent = mode(result.stat);
$('file-size').textContent = `${result.bytes.length.toLocaleString()} bytes`;
let editable = true;
try {
if (result.bytes.includes(0)) throw new Error('Binary');
$('editor').value = text.decode(result.bytes);
} catch { editable = false; $('editor').value = ''; }
$('editor').hidden = !editable;
$('binary').hidden = editable;
$('edit-actions').hidden = !editable;
status('File loaded.');
}
}
function mayLeave() { return !dirty || window.confirm('Discard unsaved changes?'); }
document.addEventListener('click', event => {
const link = event.target.closest('a[data-path]');
if (!link || event.button !== 0 || event.ctrlKey || event.metaKey || event.shiftKey || event.altKey) return;
event.preventDefault();
if (!busy && mayLeave()) action(() => navigate(link.dataset.path));
});
$('path-form').onsubmit = event => {
event.preventDefault();
if (mayLeave()) action(() => navigate($('path').value));
};
$('reload').onclick = () => { if (mayLeave()) action(() => navigate(current ? currentPath : locationPath(), 'none')); };
$('editor').oninput = () => { dirty = true; controls(); };
$('save').onclick = () => action(async () => {
const bytes = new TextEncoder().encode($('editor').value);
const active = await connectedClient();
let count;
try { count = await active.writePath(currentPath, bytes); }
catch (error) {
if (active.closed) throw new Error('Save interrupted. The file may be partially written; your edits are still here.');
throw error;
}
// Keep the editor intact if refreshing after a successful write fails.
dirty = false;
await navigate(currentPath, 'none');
status(`Saved ${count.toLocaleString()} bytes.`);
});
$('download').onclick = () => {
const url = URL.createObjectURL(new Blob([current.bytes]));
const link = document.createElement('a'); link.href = url; link.download = current.stat.name; link.click();
setTimeout(() => URL.revokeObjectURL(url), 1000);
};
window.addEventListener('popstate', () => {
if (busy || !mayLeave()) { history.pushState(null, '', pathURL(currentPath)); return; }
action(() => navigate(locationPath(), 'none'));
});
window.addEventListener('beforeunload', event => {
if (dirty) { event.preventDefault(); event.returnValue = ''; }
});
action(() => navigate(locationPath(), 'none'));
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